Two-holed hook and sling



Oct. 3, 1961. R. G. EGGEMAN TWO-HOLED HOOK AND SLING Filed Feb. 5, 1958Robert G. Eggeman INVENTOR.

9 BY min away E M35 3,002,780 TWO-HOLED HOOK AND SLING Robert G.Eggeman, 7544 Osceola St.,

Westminster, Colo. Filed Feb. 5, 1958, Ser. No. 713,453 2 Claims. (Cl.29474) The present invention relates to that field of endeavor which hasto do with lifting, lowering and otherwise handling heavy and unwieldyloads and has reference, more particularly, to an improved book andsling of a type which is preferably used in conjunction with a hook andwhich, in most instances, takes the form of an endless loop formed fromeither wire rope or a bendably flexible cable.

As will be evident from an almost casual glance at the illustrativeviews of the accompanying drawing, the concept pertains to the sling andhook either singly or collectively. More particularly there is involvedan endless loop-form sling having upper and lower bight portionsconnected by paralleling reach portions, and a complemental sling hookhaving a body with at least two companion but independent passagesopening through top and bottom sides of said body, and at least onehook, said reach portions passing slidingly and freely through theirrespective passages, the upper bight portion adapted to be connectedwith a hoist hook or the like, the lower bight portion adapted to beremovably hitched over the bill of said hook or, alternatively drawntightly against the bottom of that portion of the bottom bridging thelower ends of said passages.

The invention also features, as the title implies, a so-called two-holedhook wherein the aforementioned passages or holes are generally straightand parallel with each other and in fact are separated by a divider orpartition of solid metal, the holes being of a cross-section which isintended to promote freedom of sliding movement of the lengthwise orreach portions of the loop-type sling, thus equalizing stresses andstrains imposed on the reach portions, whereby the sling and sling hookfunction conjointly particularly when the assemblage is used as astraight hoist hook. Novelty is predicated on the construction so fardisclosed and wherein the bottom of the body portion of the hook isapproximately flat, the one hook mentioned having a flat-bottomed shankwhich is coplanar with the plane of the flat bottom. This shankterminates at the end remote from the body in a turned-in bill or beakportion which is spaced a requisite distance from the adjacent side ofthe body portion. In the preferred embodiment two such hooks areemployed and these project from diametrically opposite sides of the bodyportion and are capable of use either singly or collectively as workconditions may require.

Novelty in addition has to do with the construction stated and whereinthe central or median portion of the bottom, particularly the lower endof a divider or partition between the holes has a groove communicatingwith the lower flared ends of the bores or holes, this to provide a seatfor a cooperating bight portion of the endless loop sling as will behereinafter made more aptly evident.

Other objects, features and advantages will become more readily apparentfrom the following description and the accompanying illustrativedrawing.

In the drawing:

FIG. 1 is a perspective view of the two-holed duplex hook constructionshowing how it is used in connection with the loop sling and the hook onthe lower end of a lifting or hoisting line or cable;

FIG. 2 is an enlarged bottom plan view illustrating States Patent 9 iatented Oct. 3, 1961 primarily the bottom formation and bottom planconfiguration of the hook.

FIG. 3 is a section on the central line 3-3 of FIG. 2 looking in thedirection of the arrows;

FIG. 4 is a section on the vertical line 4-4 of FIG.3; and

FIG. 5 is a smaller perspective view similar to FIG. 1 but showing theinvention used as a straight-away lifting or conventional hoist hook.

With reference now to the drawings with the aid of reference numeralsand lead lines the duplex or twin hook is either cast of steel orofdrop-forged steel. The size and weight depends on, as is obvious, thevarying job needs. The aforementioned body portion is denoted generallyby the numeral 6 and is of general rectangular block-like form. The twoholes or passages are identical and are denoted by the numeral 8 andthey extend in requisite parallelism (see FIG. 4) through the top andbottom sides of the body portion. The upper and lower ends are slightlyincreased in diameter or flared and of desirable bell-like form asdenoted at 10 and 12 in FIG. 4. The holes are sufiiciently far apartthat a considerable mass of metal exists therebetween and thisconstitutes a separator or divider which is denoted in FIG. 4 by thenumeral 14. It will be noticed in this same figure that the lower end ofthe divider has a transverse channel or groove 16 which communicateswith the lower flared ends 12 of the holes 8. Although not absolutelyessential the construction is preferably that wherein two duplicatehooks are provided the one at the left being denoted by the numeral 18and the one at the right by the numeral 20. Each hook is characterizedby a gradually narrowing shank portion 22 and a tapering rather bluntended turned-in bill or beak portion 24 spaced from the adjacent side ofthe body. The shanks are coplanar with each other and are also in aplane or coplanar with a substantially flat bottom 26 of the over-allcasting.

The wire rope or cable is denoted by the numeral 28.

and as before stated this is preferably of endless loop form. In thearrangement shown in FIGS. 5 and 1 respectively the lengthwise or sidereaches 30 pass slidingly through their respective holes and the lowerbight portion (lower in the views of the drawing) is denoted at 30 andis releasably engaged over the left book 18 as shown. The upper bightportion 30 is actually made up of the free end portions 34 of the cablewhich are overlapped and are spliced together or joined by clamps orequivalent means 36. This upper bight portion 32 is adapted to be hungover the hook 38 on the lower end of the hoisting line 40.

In the arrangement seen in FIG. 5 the construction is the same exceptthat the lower bight portion 30 is directly engaged or seated in theseating groove 16, this bemg a showing of the aforementionedconventional hoisttype of hook.

With the construction shown it is evident that no specific cable or wirerope construction, as is commonly used, is necessary. Besides it is amatter of difliculty as is well known for one to make a satisfactory eyesplice. With this construction the hook enables any unskilled person tomake a sling inasmuch as the cable ends are merely secured by cableclamps, no expensive or time-consuming splices being essential.

It should be noted that when the load is disengaged the hook not slipoff the cable or rope (whichever is used) and further noted that thehook can be used as a conventional hook when not being used with therope or cable. Also, the holes will handle cables of ditferent sizes,depending on the size of the holes.

This hook can be used to advantage as a conventional hoist hook, as wellas a choker or sling hook; because the cable employs both cable holesand the hook can not come oli. The divider between the holes is solidmetal cast with the body of the hook and preventsdisplacement.

The use of the two-holed hook facilitates abetter holdirig or chokeraction than a regular single sling with or without a conventional chokerhook. There are two cables around a load instead of one cable.

A two-holed sling hook-facilitates the use of-rsmall'er diameter cable,which is more flexible and easier to handle than a large single cableused to lift the same load. Example: A loop made of 4;" diameter cableusing the two-holed hook is stronger than a /2"'d.iameter single slingwith spliced loops.

The two-holed hook and endless sling facilitates the easiness of pullinga cable out from under a load since there are no splices, bulges orsharp edges to catch or mar material being handled.- There is only thenormal cable portions to be pulled out. The two-holed hook has no wedgesor other objects to hinder the operation of the hook. Regardless of thecondition .of the cable, the two-holed hook will function properly.

I11 prior art hooks requiring wedges, the wedge is difficult; orimpossible to force into .place after the cable has been used andkinked. The word kinked? means that a cable pulled tight around 'a load.with sharp or irregular shape, the cable tends to take a permanentshape of the load. The cable is nearly impossible to straighten toitsoriginal shape, so a wedge could be placed and forced to contact thecable performing the act it was originally intended to do. A hook with awedge has to have the correct size wedge to-fit a specific sized cable,and at no time can a hook with a wedge be used as a straight or hoisthook. There is nothing suflicient to i keep the cable from pullingthrough the hook. In the.

hook with thewedge, the cable is constantly under an abrasive actionby'the wedge, and if the wedge is removed from the hook'there is apossibility of the hook comingotf the cable.

Regardless of the size of the holes in the two-holed hook, a sling canbe made even.- If the holes are too large in the hook for the cableavailable, the cable will do the jobga sling can stillbe made, or anassembly to use as a straight hoist hook. There is no danger of thehookbreaking or pulling out.

Theforegoing is considered-as illustrative'only of the principles of theinvention. Further, since numerous modifications and "changes willreadily occur to'those comprising, in combination therewith,;abodyformed .as

a unitary member having abasegside' andtop and'a pair of spaced,substantiallygparallel passageways extending therethrough from the baseto the top with each reach portion of the sling slideably extendingthrough .one of the passageways for free slideable movement. of thereach portion through the passageway, a wire'rope abutment at the baseof the body between the passagewaysadapted to hold the body against thelower bight .of the sling.

when the body is slid thereagainst and ahook outstandirig from the sideto serve as a hoist hook when the body.

is at the lower end of the sling and against the-lower bight and toserve as a bight connector when the reach portions are slid throughthepassageway to form a choker loop below'thebody wherein the ends of saidpassageways are flared whereby to prevent wear and abrasion of the bodyat the ends of the passageways.

2. In'the sling-hook defined in claim 1, said wire-rope abutmentcomprising a recessed groove-in the base of the body between'saidpassageways whereby to protect said bight when the unit is servingas ahoist .hook and rounded'corners 'atythe base of 'the groove adjacent tothe passagewayswhereby to prevent wear, and abrasion of the sling at theends of the groove.

References (Jited in the file of this patent UNITED STATES PATENTS573,248 Thompson ,Dec. 15,1896 2,043,460 Young June 9, 1936' 2,080,148Naysmith Mayll, 1937' 2,184,466 Ost et'al; Dec. 26, 1939' 2,505,883Chevalier May 2, 1950' 2,552,758 Andersen May 15, 1951 2,789,003-Wirkkala Apr. 16, 1957' 2,819,923 Anderson Jan. 14, 1958

